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156
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| Question | Answer |
|---|---|
| ________ move from areas of highest to lowest concentration | Electrons |
| Why do electrons move during friction? | The materials have different electron affinities (different tendencies to gain or lose electrons) |
| Electricity via Conduction | Touching allows electrons to flow directly from one charged object to another object |
| Electrification by Induction | Electrostatic induction plus grounding, resulting in a permanently charged object |
| Negatively charged metal rod touches a neutral metal sphere is an example of | Electricity via Conduction |
| A nearby charged object causes electrons to rearrange within a good conductor material without touching | Electrostatic Induction (Polarization) |
| Why do electrons move during during Induction? | A close charged object causes electrons in the conductor to move inside that object |
| Polarized | One side relatively negative, the other relatively positive |
| __________ Determines the force of electron travel (electron speed & x-ray penetrability) | Potential Difference |
| Potential Difference- | Exists with no current |
| Potential Difference is measured in? | Volts |
| Volts- | Unit of electric potential, ratio of energy to electric charge Represents the energy in a circuit 1 kV = 1000 V |
| Volts are the unit used to measure ________ | Electrical Pressure |
| Weak Voltage = | Small Potential Difference |
| Stronger Voltage = | Large Potential Difference |
| Coulomb= | Amount of electric charge |
| US Electric power sources = | 110 Volts |
| X-ray machine requirement = | 220 Volts |
| The rate at which electric charge flows through a conductor | Current |
| Current is measured in | Amperes (A) |
| Electrons flow in only one direction | DIRECT CURRENT (DC) |
| Electrons Repeatedly reverse directions | ALTERNATING CURRENT (AC) |
| DIRECT CURRENT (DC) Example | Battery |
| ALTERNATING CURRENT (AC) Example | Household Wall Outlet |
| In the United States electricity alternates at | 60 cycles per second |
| Resistance is measured in | OHMs (Ω) |
| 1 Ohm = | The resistance between that allows a current of 1 ampere when a potential difference of 1 volt is applied |
| _________ measures energy per charge | Voltage |
| ________ measures charge flowing per second | Current |
| _________ measures how difficult it is for charge to flow | Resistance |
| 1 Amp = | 1 Coulomb of charge per second |
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user-2016295